Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A logical address that identifies the workstation
The logical domain address for the workstation
An alias for the computer name
A physical address that is randomly assigned each time the computer is started
A physical address that is assigned by the manufacturer

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Computer Networking
The physical layer, in reference to the OSI model, defines

None of these
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received
All of these
the interface between the X.25 network and packet mode device

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